Magnetic Field Stabilizes Zinc Anode
Magnetic Field Stabilizes Zinc Anode
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DOI：
10.1016/j.surfin.2022.101972
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发表时间：
2022-04
影响因子：
6.2
通讯作者：
Qiang Chen;Chenhao Jiang;Mao-Dong Chen;Jianli Zhang;Guangya Hou;Yi-ping Tang
中科院分区：
文献类型：
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作者：
Qiang Chen;Chenhao Jiang;Mao-Dong Chen;Jianli Zhang;Guangya Hou;Yi-ping Tang
锌基电池具有较高的理论比容量和较低的生产成本，但锌枝晶的形成限制了其在水基电池中的实际应用。本文提出了一种利用外加磁场抑制锌枝晶的新方法。在磁场和电场的共同作用下，锌离子受到洛伦兹力和螺旋运动的影响，对电解液产生扰动，促进电极表面的传质过程。这一过程促进了电极表面的传质过程，使锌离子分布更加均匀，减小了浓差极化，有效地抑制了锌枝晶的生长。电化学性能测试结果表明，磁场效应能有效降低锌的形核过电位，延长循环寿命。这种在不改变电池内部的情况下，通过在电池外部施加磁场来抑制锌枝晶的新方法，具有非常广泛的研究和应用价值。
Zinc-based batteries have high theoretical specific capacity and low production cost, but the formation of Zn dendrites limits its practical application in aqueous batteries. In this work, a new method for Zn dendrite suppression by external magnetic field is proposed. Under the interaction of magnetic field and electric field, Zn ions are affected by Lorentz force and spiral motion, which produces disturbance to the electrolyte and promotes the mass transfer process on the electrode surface. This process promotes the mass transfer process on the electrode surface, makes the distribution of zinc ions more uniform, reduces the concentration polarization, and effectively inhibits the growth of zinc dendrites. The electrochemical performance test results show that the magnetic field effect can effectively reduce the nucleation overpotential of Zn and prolong the cycle life. This new method of Zn dendrite suppression by applying magnetic field to the outside of the cell without modifying the inside of the cell has a very wide range of research and application value.